Air gun



J. C. LAY

Jan. 17, 1933.

AIR GUN lFiled May l2, 1931 INVENTOR geg. ATTORNEY fatented Jan. 17, 1933 UNITED STATES JOSEPH COY LAY, OF ROSICLARE, ILLINOIS .AIR

Applicationv led May 12,

Wy present invention has reference to a new and novel construction of air guns designed to forcibly eject therefrom either Wet or dry cement and consequently designed for use in producing stucco Work, coating masonry Walls with cement or for forming articles made from cement, and the object of the invention is the provision of a gun for this purpose of a construction to prevent clogging yof the suction pipe, to create a greater vacuum in such suction pipe than is ordinary and to effectively mix the air or other fluid under pressure With the cement before it is ejected through the nozzle of the gun.

To the attainment of the foregoing the invention consists in the improvement hereinafter described and definitely claimed.

In the drawing:

The ligure illustrates a side elevation of ythe improvement With parts in section.

As disclosed by the drawing my improved cement gun includes a tubular mixing chamber l that has its outer end reduced and extended to provide the same With a nozzle 2.

rIhe chamber l is formed, adjacent to its closed rear portion, With an angularly arranged tube or pipe 3 to Which is coupled the flexible pipe or tube 4: that has its second end or mouth received in the cement containing receptacle. The cement may be either dry or Wet. Entering the closed end of the mixing chamber l and extending therein for the major portion of the length of the said chamber there is the pipe or nozzle 5 connected to the source of air under pressure. The pipe 5, at the portion thereof that is arranged out- Ward of the mixing chamber, has its passage controlled by a hand operated valve 6, and the pipe has also arranged therein a coupling 7 to which is connected a tube 8 that leads to and communicates With the rear end of the pipe 3. The tube 8 has its passage controlled by a handooperated valve 9 and below the valve the said tube is provided With an air inlet port 10. The port is an important feature of the invention as the same admits air into the suction pipe 3 and permits of a greater vacuum being created in the suction pipe than is ordinary. When the valves 6 and 9 are opened air from pipe 5 Will be di- GUN 1931. Serial No. 536,863.

rected through the tube 8 and into the suction pipe 3 which will effect the cleaning of both the tube and the suction pipe. This is also an important feature in air guns employed in cement Work.

Guns in accordance with my invention are made in different sizes according to the class and quantity of the Work to be performed, and it is thought that the foregoing description When read in connection With the accompanying drawing will fully and clearly set forth the construction and operation of my invention so that further detailed description Will not be required. Obviously I do not Wish to be restricted to the precise details herein set forth and, therefore, hold myself entitled to make such changes therefrom as fairly fall Within the scope of What I claim.

Having described the invention, I claim An air cement gun comprising a mixing chamber having a closed end and reduced at its second end providing a nozzle, an angularly disposed suction pipe on and communicating with the chamber adjacent to the rear thereof, a valve controlled pipe for conducting air under pressure received through the closed back and extending for the major length of the mixing chamber, a tube coupled to the conducting pipe, a` hand operated valve for controlling the passage of air from the air conducting pipe through the tube, and said tube having an air inlet port therein below the valve.

In testimony whereof I aiiix my signature.

JOSEPH CDY LAY.

Cil 

